Six-color Holographic Color Print (IMAGE) Singapore University of Technology and Design Caption Enhanced optical security provided by a six-color holographic color print. Credit SUTD Usage Restrictions The image should be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.